<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
div{
width: 600px;
height: 600px;
background-color: aquamarine;
}
.ip{
width: 300px;
height: 300px;
background-color: antiquewhite;
}
a{
    text-decoration: none;
}

    </style>
</head>
<body>
    <div>
        3331111
    </div>
    <div class="ip"><a href="#">我是一个链接</a>


    </div>
    
</body>
</html>